WO2021006211A1 - Encre et procédé d'impression à jet d'encre - Google Patents

Encre et procédé d'impression à jet d'encre Download PDF

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Publication number
WO2021006211A1
WO2021006211A1 PCT/JP2020/026217 JP2020026217W WO2021006211A1 WO 2021006211 A1 WO2021006211 A1 WO 2021006211A1 JP 2020026217 W JP2020026217 W JP 2020026217W WO 2021006211 A1 WO2021006211 A1 WO 2021006211A1
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WIPO (PCT)
Prior art keywords
ink
recording medium
water
inkjet
examples
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PCT/JP2020/026217
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English (en)
Japanese (ja)
Inventor
波 崔
正悟 戸田
径明 武田
博俊 高橋
Original Assignee
日本化薬株式会社
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Application filed by 日本化薬株式会社 filed Critical 日本化薬株式会社
Priority to EP20837812.5A priority Critical patent/EP3998164A4/fr
Priority to CN202080049034.3A priority patent/CN114080432B/zh
Priority to US17/596,715 priority patent/US20220315783A1/en
Priority to JP2021530675A priority patent/JPWO2021006211A1/ja
Publication of WO2021006211A1 publication Critical patent/WO2021006211A1/fr

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01Ink jet
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00Inks
    • C09D11/30Inkjet printing inks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0023Digital printing methods characterised by the inks used
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/502Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00Inks
    • C09D11/02Printing inks
    • C09D11/10Printing inks based on artificial resins
    • C09D11/106Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C09D11/107Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from unsaturated acids or derivatives thereof
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00Inks
    • C09D11/30Inkjet printing inks
    • C09D11/32Inkjet printing inks characterised by colouring agents
    • C09D11/322Pigment inks

Definitions

  • the present invention relates to an inkjet printer including an ink, an inkjet recording method using the ink, a recording medium to which the ink is attached, and a container filled with the ink.
  • the inkjet printing method using an inkjet printer is known as one of the typical color printing methods.
  • this inkjet method small droplets of ink are generated and attached to a recording medium such as paper for printing.
  • Non-aqueous solvent inks, curable inks, and the like are known as inks used when printing on such ink non-absorbent or poorly absorbable recording media.
  • water-based inks that replace these inks.
  • Such water-based inks contain water-insoluble colorants and dispersants, and generally also contain polymers, waxes and the like for the purpose of improving scratch resistance, solvent resistance and the like.
  • Such water-based inks are extremely easy to dry due to their high solid content, and solids are likely to be generated by drying.
  • the solid matter forms a film to improve the fixability and scratch resistance to the recording medium. Therefore, it is desirable that the film formed by the solid matter is stronger.
  • ink drying also occurs during long-term storage, storage in a high temperature or low humidity environment, etc.
  • solid matter is generated in the nozzle of the inkjet head or the ink flow path, which causes clogging.
  • ink cannot be ejected stably, which causes a problem that the image quality of the recorded image is deteriorated.
  • the inkjet head itself may become unusable, which is a big problem. Therefore, even if a solid substance is generated in the inkjet head or the like, there is a strong demand for a performance that can easily clean the solid substance.
  • Patent Documents 1 to 6 describe a resin emulsion or a resin particle dispersion, and an ink composition containing the same.
  • the present invention is an inkjet printer including an ink having good color development, scratch resistance and cleanability, an inkjet recording method using the ink, a recording medium to which the ink is attached, and a container filled with the ink.
  • the challenge is to provide.
  • Specific means for solving the above problems include the following embodiments. 1) Contains water-insoluble colorants, dispersants, polymer resins, and water, The polymer resin is radically polymerizable in the molecule with four types of monomers selected one by one from methacrylic acid, C1-C4 alkyl methacrylate, C6-C10 alkyl acrylate, and C2-C4 unsaturated alkyl methacrylate.
  • the inkjet recording method according to 5) wherein the recording medium is a recording medium having an ink receiving layer.
  • the inkjet recording method according to any one of 5) to 7), wherein the inkjet printer is a line head type inkjet printer.
  • the recording medium according to 9), wherein the recording medium is a recording medium selected from a recording medium having an ink receiving layer and a recording medium having no ink receiving layer.
  • the present invention includes an ink having good color development, scratch resistance and detergency, an inkjet recording method using the ink, a recording medium to which the ink is attached, and a container filled with the ink.
  • An inkjet printer can be provided.
  • the ink according to the present embodiment contains a water-insoluble colorant, a dispersant, a polymer resin, and water, and the polymer resins are methacrylic acid, C1-C4 alkyl methacrylate, C6-C10 alkyl acrylate, and C2 methacrylate. It consists of four types of monomers selected one by one from -C4 unsaturated alkyl and a reactive emulsifier having a radically polymerizable double bond in the molecule.
  • the components contained in the ink according to the present embodiment will be described in detail. As for each component described below, one of them may be used alone, or two or more of them may be used in combination.
  • the water-insoluble colorant means a colorant having a solubility in water at 25 ° C. of usually 3 g / L or less, preferably 2 g / L or less, and more preferably 1 g / L or less.
  • water-insoluble colorant examples include pigments, disperse dyes, and solvent dyes. Representative of these colorants include C.I. I. Pigment, C.I. I. Disperse, and C.I. I. Colorants selected from Solvent may be mentioned.
  • pigments examples include inorganic pigments, organic pigments, and extender pigments.
  • inorganic pigment examples include carbon black, metal oxide, metal hydroxide, metal sulfide, metal ferrocyanide, metal chloride and the like.
  • carbon black examples include thermal black, acetylene black, oil furnace black, gas furnace black, lamp black, gas black, and channel black. Among these, furnace black, lamp black, acetylene black, channel black and the like are preferable. Various types of carbon black can be easily obtained from Colombia Carbon, Cabot, Degussa, Mitsubishi Chemical Corporation and others.
  • organic pigments examples include soluble azo pigments, insoluble azo pigments, insoluble diazo pigments, condensed azo pigments, phthalocyanine pigments, quinacridone pigments, isoindolinone pigments, dioxazine pigments, perylene pigments, perinone pigments, thioindigo pigments and anthracinone pigments.
  • examples include quinophthalone pigments.
  • organic pigments include, for example, C.I. I. Pigment Yellow 1, 2, 3, 12, 13, 14, 16, 17, 24, 55, 73, 74, 75, 83, 93, 94, 95, 97, 98, 108, 114, 128, 129, 138, 139, 150, 151, 154, 180, 185, 193, 199, 202; C.I. I. Pigment Red 5, 7, 12, 48, 48: 1, 57, 88, 112, 122, 123, 146, 149, 150, 166, 168, 177, 178, 179, 184, 185, 202, 206, 207, 254, 255, 257, 260, 264, 269, 272; C.I. I.
  • extender pigments examples include silica, calcium carbonate, talc, clay, barium sulfate, and white carbon. These extender pigments are often used in combination with inorganic pigments or organic pigments for the purpose of improving the fluidity of the powder.
  • a self-dispersing pigment obtained by chemically treating the surface of the pigment particles to impart self-dispersity can also be used.
  • disperse dye examples include C.I. I. Dispers Yellow 9, 23, 33, 42, 49, 54, 58, 60, 64, 66, 71, 76, 79, 83, 86, 90, 93, 99, 114, 116, 119, 122, 126, 149, 160, 163, 165, 180, 183, 186, 198, 200, 211, 224, 226, 227, 231, 237; C.I. I. Dispers Red 60, 73, 88, 91, 92, 111, 127, 131, 143, 145, 146, 152, 153, 154, 167, 179, 191, 192, 206, 221, 258, 283; C.I. I.
  • water-insoluble colorant a water-insoluble copolymer colored by a water-soluble colorant can also be mentioned.
  • the water-insoluble copolymer include polyester, a dispersant described later, and a polymer resin.
  • water-soluble colorant examples include direct dyes, acidic dyes, edible dyes, basic dyes, reactive dyes, vat dyes, and soluble vat dyes.
  • Representative of these colorants include C.I. I. Direct, C.I. I. Acid, C.I. I. Food, C.I. I. Basic, C.I. I. Reactive, C.I. I. Vat and C.I. I. Examples thereof include dyes selected from Solved Vat.
  • the same copolymer may be used for the copolymer in the water-insoluble copolymer colored by the water-soluble colorant and the copolymer used as, for example, a dispersant, and different copolymers may be used. You may use it.
  • the former is a water-insoluble colorant and the latter is a dispersant among the copolymer colored by the water-soluble colorant and the copolymer not colored by the water-soluble colorant. Each corresponds.
  • pigments are preferable, and C.I. I. Pigments selected from Pigment are more preferred.
  • the content of the water-insoluble colorant in the total mass of the ink according to the present embodiment is usually 1 to 30% by mass, preferably 1 to 15% by mass, and more preferably 2 to 10% by mass.
  • the dispersant is used for the purpose of dispersing the water-insoluble colorant in the ink.
  • the dispersant is not particularly limited, and a known dispersant can be used, but a polymer dispersant such as a resin is generally used.
  • resins include polyvinyl alcohol, cellulose derivatives, polyethylene oxide, polypropylene oxide, (meth) acrylic acid, crotonic acid, itaconic acid, itaconic acid monoester, maleic acid, maleic acid monoester, fumaric acid, and the like.
  • Ionic monomers such as fumaric acid monoester, vinyl sulfonic acid, sulfoethyl methacrylate, sulfopropyl methacrylate, ⁇ , ⁇ -unsaturated monomer of sulfonated vinyl naphthalene, styrene, styrene derivative, vinyl naphthalene, vinyl naphthalene derivative, ⁇ , ⁇ -Adicyclic alcohol ester of ethylenically unsaturated carboxylic acid, acrylonitrile, vinylidene chloride, vinyl acetate, vinyl chloride, (meth) acrylamide, hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, glycidyl (meth) acrylate, N -Examples include polymers derived from butoxymethyl (meth) acrylamide and the like.
  • (meth) acrylic is used to mean both “acrylic” and “methacrylic”. The same applies to “(meth) acrylate” and the like.
  • the dispersant can be obtained as a commercial product or can be synthesized.
  • Commercially available products include, for example, John Krill 62, 67, 68, 678, 687 (styrene-acrylic copolymer manufactured by BASF); Movinyl S-100A (modified vinyl acetate manufactured by Japan Coating Resin Co., Ltd.). Copolymer); Julimer AT-210 (polyacrylic acid ester copolymer manufactured by Toa Synthetic Co., Ltd.); and the like.
  • Examples of the dispersant obtained by synthesis include the same as the AB block polymer disclosed in International Publication No. 2013/115071, including preferable ones.
  • the method for producing the AB block polymer is the same as the production method disclosed in International Publication No. 2013/115071.
  • the monomer constituting the A block is selected from (meth) acrylic acid and linear or branched C4 alkyl (meth) acrylate.
  • One or more kinds of monomers, and the monomer constituting the B block is one or more kinds of monomers selected from benzyl methacrylate and benzyl acrylate.
  • the monomer constituting the A block one or more kinds of monomers selected from methacrylic acid and n-butyl methacrylate are preferable, and it is more preferable to use these two kinds of monomers together.
  • Benzyl methacrylate is preferable as the monomer constituting the B block. Specific examples thereof include block copolymers disclosed in Synthesis Examples 3 to 8 of International Publication No. 2013/115071.
  • the mass average molecular weight (Mw) of the dispersant is usually 10,000 to 60,000, preferably 10,000 to 40,000, more preferably 15,000 to 30,000, and even more preferably 20,000 to 25,000.
  • the acid value of the dispersant is usually 90 to 200 mgKOH / g, preferably 100 to 150 mgKOH / g, and more preferably 100 to 120 mgKOH / g.
  • the PDI (mass average molecular weight / number average molecular weight) of the dispersant is about 1.29 to 1.49. By setting the range as described above, the dispersibility and storage stability of the ink tend to be improved.
  • the dispersant can be used in a state of being mixed with a water-insoluble colorant. Further, it can be used in a state where a part or all of the surface of the water-insoluble colorant is coated with the dispersant. Alternatively, both of these states may be used together.
  • the ink according to the present embodiment is preferably prepared by preparing a dispersion liquid containing a water-insoluble colorant and a dispersant, and then mixing the ink with other components.
  • a method for preparing the dispersion a known method can be adopted.
  • An example of a method for preparing a dispersion is a phase inversion emulsification method. That is, a dispersant is dissolved in an organic solvent such as 2-butanone, and an aqueous solution of a neutralizing agent is added to prepare an emulsion. A water-insoluble colorant is added to the obtained emulsion for dispersion treatment.
  • the target dispersion can be obtained by distilling off the organic solvent and a part of water from the liquid thus obtained under reduced pressure.
  • the dispersion treatment can be performed using, for example, a sand mill (bead mill), a roll mill, a ball mill, a paint shaker, an ultrasonic disperser, a microfluidizer, or the like.
  • beads having a particle size of about 0.01 to 1 mm can be used, and the filling rate of the beads can be appropriately set to perform the dispersion treatment.
  • the dispersion obtained as described above may be subjected to operations such as filtration and centrifugation. By this operation, the particle diameters of the particles contained in the dispersion liquid can be made uniform. If foaming occurs during the preparation of the dispersion, a very small amount of a known antifoaming agent such as silicone or acetylene glycol may be added.
  • Methods for preparing the dispersion other than the above include acid analysis method, interfacial polymerization method, in-situ polymerization method, in-liquid curing coating method, core selvation (phase separation) method, in-liquid drying method, melting dispersion cooling method, and the like.
  • Examples include an aerial suspension coating method and a spray drying method.
  • phase inversion emulsification method an acid analysis method, and an interfacial polymerization method are preferable.
  • the average particle size (D50) of the water-insoluble colorant in the dispersion is usually 300 nm or less, preferably 30 to 280 nm, more preferably 40 to 270 nm, and further preferably 50 to 250 nm.
  • the average particle size (D90) of the water-insoluble colorant is usually 400 nm or less, preferably 350 nm or less, and more preferably 300 nm or less.
  • the lower limit is preferably 100 nm or more.
  • the average particle size (D10) of the water-insoluble colorant is usually 10 nm or more, preferably 20 nm or more, and more preferably 30 nm or more.
  • the upper limit is preferably 100 nm or less.
  • the particle size of the water-insoluble colorant can be measured by using laser light scattering.
  • the content of the dispersant in the total mass of the ink according to the present embodiment is usually 0.5 to 6.0% by mass, preferably 0.5 to 4.0% by mass, and more preferably 1.0 to 4. It is 0% by mass.
  • the polymer resin contains four types of monomers selected one by one from methacrylic acid, C1-C4 alkyl methacrylate, C6-C10 alkyl acrylate, and C2-C4 unsaturated alkyl methacrylate, and radically polymerizable in the molecule. It is a copolymer composed of a reactive emulsifier having a double bond. By using such a polymer resin, the storage stability and scratch resistance of the ink tend to be further improved.
  • copolymer examples include block copolymers, random copolymers, graft copolymers, and the like, and random copolymers are preferable.
  • the polymeric resin may be in the form of a salt.
  • the polymer resin can be synthesized by a known method.
  • the C1-C4 alkyl methacrylate has a linear alkyl moiety such as methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, n-butyl methacrylate; isopropyl methacrylate, isobutyl methacrylate, t methacrylate.
  • the alkyl moiety such as butyl is branched chain; the alkyl moiety such as cyclopropyl methacrylate and cyclobutyl methacrylate is cyclic; and the like.
  • those having a linear alkyl moiety are preferable, C1-C3 alkyl methacrylate having a linear alkyl moiety is more preferable, and methyl methacrylate is even more preferable.
  • the C6-C10 alkyl acrylate has linear alkyl moieties such as hexyl acrylate, heptyl acrylate, octyl acrylate, nonyl acrylate, and decyl acrylate; isohexyl acrylate, isoheptyl acrylate, and isooctyl acrylate. , 2-Ethylhexyl acrylate, Isononyl acrylate, Isodecyl acrylate, etc.
  • Cyclohexyl acrylate 4-t-butylcyclohexyl acrylate, Cycloheptyl acrylate, Cyclooctyl acrylate, Acrylic acid Cyclononyl, cyclodecyl acrylate and the like having a cyclic alkyl moiety; and the like.
  • those having a branched-chain alkyl moiety are preferable, C8 alkyl acrylate having a branched-chain alkyl moiety is more preferable, and 2-ethylhexyl acrylate is even more preferable.
  • Examples of the C2-C4 unsaturated alkyl methacrylate include vinyl methacrylate, allyl methacrylate, 2-butene methacrylate, 3-methyl-2-butene methacrylate, 3-butene methacrylate and other C2-C4 alkenyl methacrylate. Can be mentioned. Among these, C2-C4 alkenyl methacrylate is preferable, C3 alkenyl methacrylate is more preferable, and allyl methacrylate is even more preferable.
  • Table 1 below shows a guideline for the content range of the above four types of monomers. It is preferable to adjust the content in the range shown in Table 1 so that the total content of the monomers is 100 parts by mass.
  • the numerical values in Table 1 are "parts by mass", and the abbreviations and the like have the following meanings.
  • MAA MC1-4 Methacrylic Acid: C1-C4 Alkyl Methacrylic Acid
  • AC6-10 C6-C10 Alkyl Acrylic Acid
  • MKC2-4 C2-C4 Unsaturated Alkyl Methacrylic Acid
  • the reactive emulsifier is an emulsifier having a radically polymerizable double bond in the molecule.
  • the number of radically polymerizable double bonds is usually one.
  • an anionic type reactive emulsifier having an anionic group in the molecule is preferable.
  • Such an anion-type reactive emulsifier is sometimes referred to as a "reactive anionic surfactant" or the like.
  • the anionic group include a sulfonic acid group, a sulfonate group, a sulfate ester group, a phosphoric acid group, a phosphoric acid ester group, a nitrate ester group, a carboxy group, and salts thereof.
  • a sulfonic acid group, a sulfonate group, a sulfate ester group, and salts thereof are preferable, and a salt of a sulfate ester group is more preferable.
  • the salt include ammonium salts, alkali metal salts (for example, sodium salts, potassium salts, etc.) and the like.
  • an ethylenically unsaturated monomer having a sulfonic acid group, a sulfonate group, a sulfate ester group, a phosphoric acid group, a phosphoric acid ester group, and a group selected from these salts is preferable.
  • the reactive emulsifier include polyoxyalkylene alkenyl ether ammonium sulfate, ether sulfate type ammonium, phosphoric acid ester, bis (polyoxyethylene polycyclic phenyl ether) methacrylate sulfate ester, 2-sodium sulfoethyl methacrylate, and alkoxy polyethylene glycol.
  • Maleic acid esters and salts thereof can be mentioned.
  • the reactive emulsifier examples include sodium alkylallyl sulfosuccinate (manufactured by Sanyo Kasei Kogyo Co., Ltd., eleminol JS-20), dipotassium alkenyl succinate (manufactured by Kao Co., Ltd., Latemul ASK), polyoxyethylene alkylpropenylphenyl ether sulfate.
  • Ester salt (Aqualon HS-10, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.), ⁇ - [1-[(allyloxy) methyl] -2- (nonylphenoxy) ethyl] - ⁇ -polyoxyethylene sulfate ester salt (ADEKA Co., Ltd.)
  • Adecaria soap SE series such as Adecaria soap SE-10N
  • Polyoxyethylene-1- (allyloxymethyl) alkyl ether sulfate ammonium salt manufactured by Daiichi Kogyo Seiyaku Co., Ltd., Aquaron KH-1025, etc.
  • the reactive emulsifier is used together with the above four types of monomers when synthesizing a polymer resin. Thereby, an emulsion of a polymer resin can be obtained.
  • the amount of the reactive emulsifier used when synthesizing the polymer resin is not particularly limited. As a guideline for the amount used, it is usually 0.1 to 10% by mass, preferably 0.3 to 5% by mass, more preferably 0.5 to 3% by mass, and further, based on the total mass of the above four types of monomers. It is preferably 1 to 3% by mass.
  • the reactive emulsifier in the above range, the polymer resin can be stably synthesized, the average particle size of the polymer resin can be controlled in a suitable range, and the viscosity of the emulsion of the polymer resin can be adjusted. It tends to be able to be adjusted to a suitable range.
  • the average particle size of the polymer resin is usually 10 to 500 nm, preferably 20 to 200 nm, more preferably 40 to 120 nm, and even more preferably 70 to 90 nm. By setting the average particle size in this range, clogging of the inkjet head and reaggregation of the polymer resin tend to be suppressed.
  • the glass transition point (Tg) of the polymer resin is usually ⁇ 30 to 25 ° C., preferably ⁇ 25 to 20 ° C., more preferably ⁇ 20 to 20 ° C., and even more preferably ⁇ 15 to 20 ° C.
  • the acid value of the polymer resin is usually 0.5 to 80 mgKOH / g, preferably 5 to 75 mgKOH / g, more preferably 8 to 70 mgKOH / g, and even more preferably 10 to 65 mgKOH / g.
  • the insolubility of the polymer resin in tetrahydrofuran is usually 80 to 100%, preferably 90 to 100%. By setting such insolubility, the average molecular weight of the polymer resin is controlled, and the polymer resin tends to be free of unreacted monomers and the like as impurities.
  • the lower limit of the polymer resin content (solid content conversion value) in the total mass of the ink according to the present embodiment is usually 0.1% by mass, preferably 0.2% by mass, and more preferably 0.3% by mass.
  • the upper limit is usually 10% by mass, preferably 7% by mass, more preferably 6% by mass, and further preferably 5% by mass.
  • water water having a low content of impurities (metal ions and the like) such as ion-exchanged water and distilled water is preferable.
  • the water content in the total mass of the ink according to the present embodiment is usually 30 to 80% by mass, preferably 35 to 75% by mass, and more preferably 40 to 70% by mass.
  • the ink according to the present embodiment preferably further contains a water-soluble organic solvent.
  • the water-soluble organic solvent include C1-C6 alkanols such as methanol, ethanol, propanol, isopropanol, butanol, isobutanol, second butanol, and third butanol; N, N-dimethylformamide, N, N-dimethylacetamide and the like.
  • Carboxyl amides such as 2-pyrrolidone, N-methyl-2-pyrrolidone, N-methylpyrrolidin-2-one; 1,3-dimethylimidazolidine-2-one, 1,3-dimethylhexahydropyrimido Cyclic ureas such as -2-one; ketones or keto alcohols such as acetone, 2-methyl-2-hydroxypentane-4-one, ethylene carbonate; cyclic ethers such as tetrahydrofuran and dioxane; ethylene glycol, diethylene glycol, 1, 2-propylene glycol, 1,3-propylene glycol, 1,2-butylene glycol, 1,4-butylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, dipropylene glycol, polyethylene glycol (preferably molecular weights 400, 800, 1540 or higher), mono, oligos, or polyalkylene glycols and thioglycols having C2-
  • the content of the water-soluble organic solvent in the total mass of the ink according to the present embodiment is usually 0 to 60% by mass, preferably 1 to 60% by mass, more preferably 2 to 50% by mass, and further preferably 3 to 45%. It is by mass, particularly preferably 5 to 40% by mass.
  • the ink according to the present embodiment may further contain an ink preparation agent in addition to the above-mentioned components.
  • the ink preparation agent include surfactants (excluding those corresponding to reactive emulsifiers), antiseptic and antifungal agents, pH adjusters, antifoaming agents and the like.
  • the total content of the ink preparation agent in the total mass of the ink according to the present embodiment is usually 0 to 30% by mass, preferably 0.1 to 20% by mass, and more preferably 0.5 to 10% by mass.
  • the surfactant examples include anionic, cation, nonionic, amphoteric, silicone-based, and fluorine-based surfactants.
  • a silicone-based surfactant and a fluorine-based surfactant are preferable, and a silicone-based surfactant is more preferable from the viewpoint of safety to the living body and the environment.
  • anionic surfactant examples include alkyl sulfocarboxylates, ⁇ -olefin sulfonates, polyoxyethylene alkyl ether sulfates, polyoxyethylene alkyl ether sulfates, N-acylamino acids or salts thereof, and N-acylmethyl.
  • Taurine salt alkyl sulfate polyoxyalkyl ether sulfate, alkyl sulfate polyoxyethylene alkyl ether phosphate, loginate soap, castor oil sulfate, lauryl alcohol sulfate, alkylphenol type phosphoric acid ester, alkyl type phosphoric acid ester, Examples thereof include alkylaryl sulfonate, diethyl sulfo sulphate, diethyl hexyl sulfo sulphate, and dioctyl sulfo sulphate.
  • Examples of the cationic surfactant include 2-vinylpyridine derivatives and poly4-vinylpyridine derivatives.
  • nonionic surfactant examples include polyoxyethylene nonylphenyl ether, polyoxyethylene octylphenyl ether, polyoxyethylene dodecylphenyl ether, polyoxyethylene oleyl ether, polyoxyethylene lauryl ether, polyoxyethylene alkyl ether, and polyoxy.
  • Ether-based ethers such as ethylene distyrene phenyl ether (for example, Emargen A-60, A-90, A-500 manufactured by Kao Co., Ltd .; polyoxyethylene oleic acid ester, polyoxyethylene distearate, sorbitan laurate, Ethers such as sorbitan monostearate, sorbitan monooleate, sorbitan sesquioleate, polyoxyethylene monooleate, polyoxyethylene stearate; 2,4,7,9-tetramethyl-5-decine-4,7 -Acetylene glycol (alcohol) type such as diol, 3,6-dimethyl-4-octine-3,6-diol and 3,5-dimethyl-1-hexin-3-ol; polyglycol ether type and the like can be mentioned.
  • ethylene distyrene phenyl ether for example, Emargen A-60, A-90, A-500 manufactured by Kao Co., Ltd .
  • Examples of these commercially available products include Surfinol 104, 104PG50, 82, 420, 440, 465, 485 manufactured by Nisshin Chemical Industry Co., Ltd .; Emargen A-60, A-90 manufactured by Kao Corporation. A-500 and the like can be mentioned.
  • amphoteric tenside agents examples include lauryldimethylaminoacetic acid betaine, 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, coconut oil fatty acid amide propyldimethylaminoacetic acid betaine, polyoctylpolyaminoethylglycine, and imidazoline. Examples include derivatives.
  • silicone-based surfactant examples include polyether-modified siloxane and polyether-modified polydimethylsiloxane.
  • Dynol 960, 980 manufactured by Air Products & Chemicals Co., Ltd . Silface SAG001, SAG002, SAG003, SAG005, SAG503A, SAG008, SAG090, SAG010; BYK Adsidives & Instruments-B.
  • Examples thereof include 345, 347, 348, 349, 3455, LP-X23288, LP-X23289, LP-X23347; TEGO Twin 4000 manufactured by Evonik Tego Chemie, TEGO Wet KL 245, 250, 260, 265, 270, 280 and the like. ..
  • fluorine-based surfactant examples include a perfluoroalkyl sulfonic acid compound, a perfluoroalkyl carboxylic acid compound, a perfluoroalkyl phosphate ester compound, a perfluoroalkyl ethylene oxide adduct, and a perfluoroalkyl ether group as side chains.
  • fluorine-based surfactant examples include polyoxyalkylene ether polymer compounds having.
  • antiseptic and antifungal agents examples include organic sulfur type, organic nitrogen sulfur type, organic halogen type, haloarylsulfone type, iodopropagil type, haloalkylthio type, nitrile type, pyridine type, 8-oxyquinoline type and benzothiazole.
  • any substance can be used as long as it is a compound capable of adjusting the pH to 5 to 11 without adversely affecting the prepared ink.
  • alkanolamines such as diethanolamine, triethanolamine and N-methyldiethanolamine
  • hydroxides of alkali metals such as lithium hydroxide, sodium hydroxide and potassium hydroxide
  • ammonium hydroxide water ammonia
  • Alkali metal carbonates such as lithium carbonate, sodium carbonate, sodium hydrogen carbonate, potassium carbonate
  • alkali metal salts of organic acids such as sodium silicate and potassium acetate
  • inorganic bases such as disodium phosphate; and the like.
  • defoaming agent examples include silicone-based, silica-mineral oil-based, olefin-based, and acetylene-based compounds.
  • examples of commercially available antifoaming agents include Surfinol DF37, DF58, DF110D, DF220, MD-20; Orfin SK-14, all manufactured by Shin-Etsu Chemical Co., Ltd.
  • the content of the defoaming agent is usually 0.01 to 5% by mass, preferably 0.03 to 3% by mass, and more preferably 0.05 to 1% by mass.
  • the content of the defoaming agent is 0.01% by mass or more, the effect as a defoaming agent tends to be obtained, and when it is 5% by mass or less, the dispersion stability tends to be good.
  • the content of inorganic impurities such as chloride (for example, sodium chloride) and sulfate (for example, sodium sulfate) of metal cations in the ink It is preferable to use a small amount.
  • the guideline for the content of the inorganic impurities is about 1% by mass or less with respect to the total mass of the colorant.
  • the lower limit may be below the detection limit of the analytical instrument, that is, 0% by mass.
  • Inorganic impurities are often mixed in the colorant. Therefore, it is possible to purify the colorant by removing inorganic impurities from the colorant as needed.
  • a solid colorant is suspended and purified in a mixed solvent of C1-C4 alcohol such as methanol and water; after the ink is prepared, inorganic impurities are exchanged and adsorbed with an ion exchange resin. Method; etc.
  • the pH of the ink according to this embodiment at 25 ° C. is usually 7 to 11, preferably 8 to 10.
  • the surface tension of the ink according to this embodiment at 25 ° C. is usually 10 to 50 mN / m, preferably 20 to 40 mN / m.
  • the viscosity of the ink according to this embodiment at 25 ° C. is usually 2 to 30 mPa ⁇ s, preferably 3 mPa ⁇ s to 20 mPa ⁇ s.
  • the pH, surface tension, and viscosity of the ink according to the present embodiment can be appropriately adjusted with a pH adjuster, a surfactant, a water-soluble organic solvent, or the like.
  • the ink according to this embodiment can be used in various recordings.
  • the ink according to this embodiment is suitable for writing tools, various types of printing, information recording, printing, etc., and is particularly preferably used for inkjet recording.
  • recording is performed by ejecting the above-mentioned ink droplets by an inkjet printer in response to a recording signal and adhering them to a recording medium.
  • the recording can be performed as described above by loading the container filled with the ink described above into a predetermined position of the inkjet printer.
  • the above-mentioned ink may be used alone or in combination with other inks.
  • the above-mentioned ink can be used in combination with an ink containing each of the yellow, blue, red, green, violet, and orange colorants.
  • the industrial inkjet printer has a line head type inkjet printer configuration for the purpose of increasing the printing speed, and single-pass printing is also preferably performed. According to the ink described above, it is possible to obtain a recorded image having good color development and excellent scratch resistance even under such printing conditions.
  • the inkjet method a known method can be used. Specific examples of the inkjet method include a charge control method, a drop-on-demand (pressure pulse) method, an acoustic inkjet method, a thermal inkjet method, and the like.
  • a method of improving the fixability of the colorant by using a colorless and transparent ink; and the like are also included.
  • Recording media means a substance to which ink can adhere.
  • Examples of recording media include paper, film, fiber or cloth (cellulose, nylon, wool, etc.), leather, a base material for a color filter, and the like.
  • Recording media can be roughly classified into those having an ink receiving layer and those not having an ink receiving layer.
  • the recording medium having an ink receiving layer is usually called an inkjet paper, an inkjet film, a glossy paper, or the like.
  • Typical examples of commercially available products are professional photo paper, super photo paper, glossy gold, and matte photo paper manufactured by Canon Corporation; photo paper Crispia (high gloss) and photo paper (glossy) manufactured by Seiko Epson Corporation. ), Photomat paper; Advanced photo paper (glossy) manufactured by Nippon Hulett Packard Co., Ltd .; Colored photo finishing Pro manufactured by Fujifilm Co., Ltd., etc.
  • Examples of the recording medium having no ink receiving layer include various types of paper such as coated paper and art paper used for gravure printing and offset printing; cast coated paper used for label printing, and the like.
  • the above-mentioned ink can be suitably used for a recording medium having no ink receiving layer.
  • a surface modification treatment on the recording medium for the purpose of improving the fixability of the colorant.
  • the surface modification treatment include corona discharge treatment, plasma treatment, frame treatment and the like.
  • the combination of preferable ones is more preferable, and the combination of more preferable ones is further preferable.
  • the "water” used in the examples is ion-exchanged water.
  • Preparation Example 1 Preparation of Polymer Resin 1
  • Water 100 parts
  • ammonium persulfate 0.3 parts
  • a reactive emulsifier (1 part) were added to a glass reaction vessel (capacity 3 L) to obtain a liquid.
  • the temperature of the liquid was raised to 70 ° C.
  • Water 120 parts
  • reactive emulsifier 0.9 parts
  • methacrylic acid 2 parts
  • methyl methacrylate 37 parts
  • 2-ethylhexyl acrylate 59 parts
  • allyl methacrylate 59 parts
  • the liquid temperature was maintained at 70 ° C. while introducing nitrogen. After completion of dropping the liquid, the mixture was further reacted at 70 ° C. for 2 hours and then cooled to 40 ° C.
  • triethanolamine 3.1 parts
  • the obtained emulsion of the polymer resin 1 is referred to as "PEM1".
  • the acid value of the obtained polymer resin 1 was 13 mgKOH / g, and the glass transition point was ⁇ 10 ° C.
  • Preparation Example 2 Preparation of Polymer Resin 2
  • An emulsion of polymer resin 2 was obtained as a white suspension.
  • the obtained emulsion of the polymer resin 2 is referred to as "PEM2".
  • the acid value of the obtained polymer resin 2 was 33 mgKOH / g, and the glass transition point was ⁇ 5 ° C.
  • Preparation Example 3 Preparation of Polymer Resin 3
  • An emulsion of the polymer resin 3 was obtained.
  • the obtained emulsion of the polymer resin 3 is referred to as "PEM3".
  • the acid value of the obtained polymer resin 3 was 20 mgKOH / g, and the glass transition point was ⁇ 5 ° C.
  • Preparation Example 4 Preparation of Polymer Resin 4
  • An emulsion of the polymer resin 4 was obtained as a white suspension having a solid content of 24.9% in the same manner as in Preparation Example 1 except that a polyoxyethylene alkyl ether as a nonionic emulsifier was used instead of the reactive emulsifier.
  • the obtained emulsion of the polymer resin 4 is referred to as "PEM4".
  • the acid value of the obtained polymer resin 4 was 13 mgKOH / g, and the glass transition point was ⁇ 10 ° C.
  • Preparation Example 5 Preparation of Polymer Resin 5
  • Water (60 parts), polyoxyethylene alkyl ether (0.3 parts), and ammonium persulfate (0.3 parts) were added to a glass reaction vessel (capacity: 3 L) to obtain a liquid. After replacing the air inside the reaction vessel with nitrogen, the temperature of the liquid was raised to 70 ° C.
  • the liquid temperature was maintained at 70 ° C. while introducing nitrogen.
  • the mixture was further reacted at 70 ° C. for 2 hours and then cooled to 40 ° C. to obtain an emulsion of the polymer resin 5 as a white suspension having a solid content of 3.5%.
  • the obtained emulsion of the polymer resin 5 is referred to as "PEM5".
  • the acid value of the obtained polymer resin 5 was 13 mgKOH / g, and the glass transition point was 10 ° C.
  • a block copolymer (block copolymer A) was obtained by retesting Synthesis Example 3 of International Publication No. 2013/115071.
  • the obtained block copolymer (6 parts) was dissolved in 2-butanone (20 parts) to prepare a uniform solution.
  • a solution prepared by dissolving sodium hydroxide (0.45 parts) in water (52.3 parts) was added to this solution, and the mixture was stirred for 1 hour to obtain a solution.
  • Carbon black (20 parts, Neurox 605 manufactured by ORION ENGINEERED CARBONS) was added to this liquid, and dispersion treatment was carried out in a sand grinder for 15 hours under the condition of 1500 rpm to obtain a liquid.
  • Examples 1 to 3 Ink preparation
  • Each component shown in Table 2 below was mixed to obtain a total amount of 100 parts of each liquid, and then the obtained liquid was filtered through a membrane filter having a pore size of 3 ⁇ m to obtain the inks of Examples 1 to 3.
  • Comparative Examples 1 and 2 Preparation of Comparative Ink
  • Inks of Comparative Examples 1 and 2 were obtained in the same manner as in Examples 1 to 3 above except that each component shown in Table 3 below was used.
  • Tables 2 and 3 The abbreviations and the like in Tables 2 and 3 below have the following meanings.
  • the numerical values in Tables 2 and 3 are "parts".
  • the number of copies in the columns of PEM1 to PEM5 in Tables 2 and 3 indicates the solid content of the emulsion of the polymer resins 1 to 5.
  • the polymer resins 4 and 5 have not reacted with the emulsifier, it is considered that the emulsifier is attached due to the hydrophobic interaction. Therefore, as the solid content of the emulsions of the polymer resins 4 and 5, the total amount of the polymer resins 4 and 5 and the emulsifier used is described.
  • PG Propylene Glycol 2Py: 2-Pyrrolidone 12HD: 1,2-Hexanediol TEA: Triethanolamine TEX: Texanol BYK-349: Silicone Surfactant, BYK-349 GXL (S): Proxel GXL (S) PEM1 to PEM5: Emulsions of polymer resins 1 to 5 obtained in Preparation Examples 1 to 5, respectively.
  • the inks of each example were excellent in color development and scratch resistance. Further, it was confirmed that the ink of each example can sufficiently dissolve and remove the solid matter even when it dries to form a solid matter. On the other hand, although the inks of each comparative example were excellent in scratch resistance, the color development property was insufficient. In addition, the inks of the comparative examples could not sufficiently dissolve and remove the solid matter generated by drying.

Abstract

La présente invention concerne une encre qui comprend un colorant insoluble dans l'eau, un dispersant, une résine polymère, et de l'eau, la résine polymère étant une résine obtenue à partir de : quatre monomères qui sont l'acide méthacrylique et trois monomères choisis respectivement parmi les méthacrylates d'alkyle en C1 à C4, les acrylates d'alkyle en C6 à C10 et les méthacrylates d'alkyle en C2 à C4 insaturés ; et un émulsifiant réactif ayant une double liaison polymérisable par voie radicalaire dans la molécule. La présente invention concerne également : un procédé d'impression à jet d'encre dans lequel l'encre est utilisée ; un support d'impression sur lequel l'encre adhère ; et une imprimante à jet d'encre comprenant un récipient rempli de l'encre.
PCT/JP2020/026217 2019-07-08 2020-07-03 Encre et procédé d'impression à jet d'encre WO2021006211A1 (fr)

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EP20837812.5A EP3998164A4 (fr) 2019-07-08 2020-07-03 Encre et procédé d'impression à jet d'encre
CN202080049034.3A CN114080432B (zh) 2019-07-08 2020-07-03 油墨及喷墨记录方法
US17/596,715 US20220315783A1 (en) 2019-07-08 2020-07-03 Ink and ink-jet recording method
JP2021530675A JPWO2021006211A1 (fr) 2019-07-08 2020-07-03

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US20220315783A1 (en) 2022-10-06
CN114080432A (zh) 2022-02-22
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EP3998164A1 (fr) 2022-05-18
CN114080432B (zh) 2023-03-28

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